dpkglist.awk is a command-line tool for querying available packages on ubuntu and debian systems. It overlaps with the standard apt-cache utility, but, written in simple awk, it is easily extensible, and makes it easy to write one-line scripts.
LIME (Less-is-More) is parallel/concurrent programming environment based on C. Internally, it uses XML technology to describe tasks and their dependencies. Externally, it offers the ANSI C99 programming as well as a set of visually-oriented interfaces.